Instantaneous velocity
The speed and direction of an object at a particular instant
magnitude
Another term given for the size of a quantity
position
the location of an object relative an origin.
time interval
The formula tf-ti represents
Vector
a quantity with both magnitude and direction
average velocity
ratio of the change in position to the time interval during which the change occurred
coordinate system
A system that defines the zero point of the variable you are studying
origin
the zero point
position-time graph
A graph with time data on the horizontal axis and position data on the vertical axis.
motion diagram
shows a series of images showing the position of a moving object over equal time intervals
resultant
A vector that represents the sum of two or more vectors
particle model
A simplified motion diagram that shows the object in motion as a series of points
distance
A scalar quantity that is the length, or size, of the displacement vector
instantaneous position
The location of an object at a particular instant
displacement
The vector quantity that defines the distance and direction between two positions
average speed
The absolute value of the slope on a position time graph